My guess is that Inno doesn't think it is worth documenting to the world (and by not documenting, they keep the ability to adjust it slightly without getting complaints). If the formulas are simple enough, it might not be that hard to figure the out, but would take a lot of data collection. My first guess is that the number of GE points needed, and the number of crowns granted at the first bar may well be just the simple sum of some value a function of the age of each guild member. To confirm this, a gathering of a couple dozen data points of the number of people of what ages are in the guild, and the value that the guild started as their 1st goal. You will need at least one data point for each variable (points per each age), and a number more to confirm the values. It isn't 'hard', but a lot of work to figure, and not that important to most people.